Rectangles 6279

Reduce the dimensions of the rectangle with dimensions of 21 cm and 1.4 dm in a ratio of 4:7. In what proportion will the areas of both rectangles be?

Correct answer:

r =  49:16 cm

Step-by-step explanation:

a=21 cm b=1.4 dm cm=1.4 10  cm=14 cm k=740.5714  c=a 74=21 74=721 4=784=12 cm d=b 74=14 74=714 4=756=8 cm  S1=a b=21 14=294 cm2 S2=c d=12 8=96 cm2  r=S1/S2=294/96=1649 cm=3.0625=49:16 cm

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Math student
If a = 12 cm, b = 27 cm, c = 16 cm, and d = 20 cm, what is the area of the poster? what is the answer

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